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[Experimental investigation on micro-hollow cathode sustained discharge]
Guang-Qing Xia1, Nader Sadeghi
1School of Aeronautics and Astronautics, Faculty of Vehicle Engineering and Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China. gq.xia@dlut.edu.cn
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|March 25, 2011
Summary
This study demonstrates that a micro-hollow cathode discharge (MHCD) with a second anode can generate large, stable plasma volumes at high pressures. Gas temperatures in the plasma plume remain around 500 K, showing minimal increase with current.
Area of Science:
- Plasma Physics
- Gas Discharge Physics
Context:
- Micro-hollow cathode discharge (MHCD) is a promising source for plasma generation.
- High-pressure plasma generation often faces challenges with stability and uniformity.
Purpose:
- To investigate the conditions for generating large volume and uniform plasma at high pressure using an MHCD device with a second anode.
- To measure the gas temperature in the plasma plume under various operating conditions.
Summary:
- A modified MHCD device incorporating a second anode was experimentally investigated.
- Stable, large-volume plasma generation was achieved when the plasma cathode current exceeded a specific threshold.
- Gas temperature measurements in the plasma plume, using nitrogen emission bands, indicated a slight increase with current (0.5-4 mA), stabilizing around 500 K at 50 Torr.
Impact:
- This research contributes to the development of high-pressure plasma sources for various applications.
- The findings provide insights into plasma stability and thermal characteristics in modified MHCD systems.
- The study validates a method for generating uniform, large-volume plasma suitable for potential industrial or scientific uses.
